Definition of trabecula in US English:



  • 1Anatomy
    Each of a series or group of partitions formed by bands or columns of connective tissue, especially a plate of the calcareous tissue forming cancellous bone.

    • ‘In such calculations, however, bone matrix is usually approximated as an isotropic material, and anisotropic mechanical properties result from a preferred orientation of the trabeculae in cancellous bone.’
    • ‘An atypical hydronephrotic type may have isolated ureteral atresia with multiple cysts communicating with a dilated renal pelvis with dysplastic renal tissue forming trabeculae between the cysts.’
    • ‘Histologic study demonstrated a fibro-osseous lesion with woven bone trabeculae and bland-looking fibrous tissue.’
    • ‘Note the presence of numerous osteoclasts lining the bone trabeculae.’
    • ‘The cistern is traversed by delicate connective tissue trabeculae, which bridge across the interval between the arachnoid mater and the pia mater.’
  • 2Botany
    Any of a number of rodlike structures in plants, e.g., a strand of sterile tissue dividing the cavity in a sporangium.

    • ‘No dots can be detected in the vacuoles but the tonoplast and the transvacuolar trabeculae of cytoplasm are labelled demonstrating that actin is present at this level.’
    • ‘Special attention was paid to the structure and pattern of the distribution of septal trabeculae.’
    • ‘The resulting septal trabeculae are thick with regularly produced lateral branches.’
    • ‘Locally there are ‘hints’ of a parallel fibrous, possibly spicular, structure in the normally irregularly crystalline microstructure of the trabeculae.’
    • ‘Together with additional stereome, these trabeculae cover dissepimentarium completely, so no reliable information on structure of dissepimentarium is available.’


Mid 19th century: from Latin, diminutive of trabs ‘beam, timber’.